Pneumatic Three-Way Regulating Valve

Keywords: metering pump accessories

Classification:

Pneumatic control valve

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DESCRIPTION

Commodity name: Pneumatic Three-Way Regulating Valve

jTechnical parameters and performance

n valve body

Model	Straight through cast ball valve
Nominal diameter	Merging valve: 25~300mm, diverting valve: 80~300mm
Nominal pressure	PN1.6、4.0、6.4MPa
Flange standard	JB/T79.1-94, 79.2-94, etc.
Material	Cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc.
Upper valve cover	Standard type -17~+230℃, heat dissipation type +230~+450℃, bellows sealed type -40~+350℃
Gland type	Bolt pressing type
filler	V-type PTFE filler, impregnated PTFE asbestos filler, graphite filler
Structure type	(See Figure 1~Figure 6 for details)

n Valve internal components

Valve core type

Thin-walled cylindrical valve core

Traffic characteristics

Parabolic and linear characteristics

Material

Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), stainless steel nickel cladding welding department

Tailai alloy, titanium and corrosion-resistant alloys, etc.

n executive agency

Model	ZHA/B multi-spring diaphragm actuator
model	ZHA/B-22	ZHA/B-23	ZHA/B-34	ZHA/B-45	ZHA/B-56
Effective area cm²	350	350	560	900	1400
Stroke mm	10、16	25	40	40、60	100
Spring range KPa	20~100 (standard), 20-60, 60-100, 40-200, 80-240
Diaphragm material	Nitrile rubber sandwiched with nylon cloth, ethylene propylene rubber sandwiched with nylon cloth
Air supply pressure	140~400KPa
Air source excuse	RC1/4″
ambient temperature	-30~+70℃

n Valve action type

Air-closed type (B) - the valve position is open (FO) when the air is lost; air-open type (K) - the valve position is closed (FC) when the air is lost.

n attachments

Positioner, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, handwheel mechanism, etc.

performance

project			Without locator	With locator
Basic error%			±6.0	±1.5
Times difference %			≤5	≤1.5
dead zone%			≤4	≤0.6
Always point deviation %	Be angry	starting point	±2.5	±1.5
		end	±6.0
	Qiguan	starting point	±6.0
		end	±2.5
Rated stroke deviation %			≤2.5
Leakage volume 1/h			0.1%×valve rated capacity
Adjustable range R			30:1

3. Rated flow system Kv, rated stroke, equipped actuator model, allowable pressure difference

Note: For bellows seal control valves, the maximum allowable pressure difference is 1.0MPa. If the value in the table is less than 1.0MPa, it will remain unchanged. If it is greater than 1.0MPa, it will be 1.0MPa.

4. Valve body structure

5. Appearance and installation dimensions

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